A are aware of an certificate issue restricting access to the ECOM site. Work is underway to resolve this issue.
Workaround:
In the meantime if using Google Chrome you should be able to click on the blue ‘Advanced’ option, from this screen you will be able to select ‘Proceed anyway’ to continue to the webpage as normal.
If using Internet Explorer you should be able to click on the blue ‘More information’ option, from this drop down you will be able to select ‘Go on to the webpage (not recommended)’ to continue to the webpage as normal.